diff options
| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2011-03-30 16:30:11 +0200 |
|---|---|---|
| committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2011-07-29 18:35:36 +0200 |
| commit | 7fe2f6399a84760a9af8896ac152728250f82adb (patch) | |
| tree | fa4bf236359b8d6d9f8d6ff823ddd3e839da5768 /tools/power/cpupower/utils/helpers/sysfs.h | |
| parent | 02f8c6aee8df3cdc935e9bdd4f2d020306035dbe (diff) | |
cpupowerutils - cpufrequtils extended with quite some features
CPU power consumption vs performance tuning is no longer
limited to CPU frequency switching anymore: deep sleep states,
traditional dynamic frequency scaling and hidden turbo/boost
frequencies are tied close together and depend on each other.
The first two exist on different architectures like PPC, Itanium and
ARM, the latter (so far) only on X86. On X86 the APU (CPU+GPU) will
only run most efficiently if CPU and GPU has proper power management
in place.
Users and Developers want to have *one* tool to get an overview what
their system supports and to monitor and debug CPU power management
in detail. The tool should compile and work on as many architectures
as possible.
Once this tool stabilizes a bit, it is intended to replace the
Intel-specific tools in tools/power/x86
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'tools/power/cpupower/utils/helpers/sysfs.h')
| -rw-r--r-- | tools/power/cpupower/utils/helpers/sysfs.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/tools/power/cpupower/utils/helpers/sysfs.h b/tools/power/cpupower/utils/helpers/sysfs.h new file mode 100644 index 000000000000..5d02d2fc70e1 --- /dev/null +++ b/tools/power/cpupower/utils/helpers/sysfs.h @@ -0,0 +1,23 @@ +#ifndef __CPUPOWER_HELPERS_SYSFS_H__ +#define __CPUPOWER_HELPERS_SYSFS_H__ + +#define PATH_TO_CPU "/sys/devices/system/cpu/" +#define MAX_LINE_LEN 255 +#define SYSFS_PATH_MAX 255 + +extern unsigned int sysfs_read_file(const char *path, char *buf, size_t buflen); + +extern unsigned long sysfs_get_idlestate_latency(unsigned int cpu, unsigned int idlestate); +extern unsigned long sysfs_get_idlestate_usage(unsigned int cpu, unsigned int idlestate); +extern unsigned long long sysfs_get_idlestate_time(unsigned int cpu, unsigned int idlestate); +extern char * sysfs_get_idlestate_name(unsigned int cpu, unsigned int idlestate); +extern char * sysfs_get_idlestate_desc(unsigned int cpu, unsigned int idlestate); +extern int sysfs_get_idlestate_count(unsigned int cpu); + +extern char * sysfs_get_cpuidle_governor(void); +extern char * sysfs_get_cpuidle_driver(void); + +extern int sysfs_get_sched(const char* smt_mc); +extern int sysfs_set_sched(const char* smt_mc, int val); + +#endif /* __CPUPOWER_HELPERS_SYSFS_H__ */ |